A manufacturing method of a rare earth magnet corrosion

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PROBLEM TO BE SOLVED : To inexpensively provide a corrosion resistant permanent magnet. SOLUTION : The corrosion resistant rare earth magnet is obtained by applying a solution comprising a flaky fine powder of a metal selected from Al, Mg, Ca, Zn, Si, Mn and an alloys thereof, and a silicone resin on the surface of a rare earth permanent magnet of R-T-M-B (wherein, R is at least one metal selected from rare earth elements including Y; T is Fe or Fe and Co; and M is selected from Ti, Nb, Al, V, Mn, Sn, Ca, Mg, Pb, Sb, Zn, Si, Zr, Cr, Ni, Cu, Ga, Mo, W and Ta, and, by weight %, 5<=R<=40, 50<=T<=90, 0<=M<=8, and 0.2<=B<=8 are satisfied) and baking them to form an adherent composite coating.